38999911 has 2 divisors, whose sum is σ = 38999912. Its totient is φ = 38999910.

The previous prime is 38999903. The next prime is 38999959. The reversal of 38999911 is 11999983.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38999911 - 2³ = 38999903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38999971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19499955 + 19499956.

It is an arithmetic number, because the mean of its divisors is an integer number (19499956).

Almost surely, 2^38999911 is an apocalyptic number.

38999911 is a deficient number, since it is larger than the sum of its proper divisors (1).

38999911 is an equidigital number, since it uses as much as digits as its factorization.

38999911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 157464, while the sum is 49.

The square root of 38999911 is about 6244.9908726915. The cubic root of 38999911 is about 339.1208863373.

The spelling of 38999911 in words is "thirty-eight million, nine hundred ninety-nine thousand, nine hundred eleven".